<?php
$m = new MongoClient; $c = $m->demo->pubs; $c->drop();
$c->insert( [ 'name' => 'Betsy Smith', 'city' => 'London' ] );
$c->insert( [ 'name' => 'London Tavern', 'city' => 'London' ] );
$c->insert( [ 'name' => 'Lammars', 'city' => 'Manchester' ] );
$c->insert( [ 'name' => 'Weatherspoons', 'city' => 'Coventry' ] );
$r = $m->demo->command( [
'distinct' => 'pubs',
'key' => 'city',
'query' => [ 'name' => [ '$ne' => 'Weatherspoons' ] ]
] );
var_dump( $r['values'] );
?>